code: def test_apply_mean_structured(self):
      x = jnp.ones(10)
      sx = [(3 * x, 2 * x), 5 * x]  # Base input
  
      wrapped_ffn = struct_params_adding_ffn(sx)
  
      rr_ensemble = ensemble.make_ensemble(
          wrapped_ffn, ensemble.apply_mean, num_networks=3
      )
      key = jax.random.PRNGKey(0)
      params = rr_ensemble.init(key)
  
      y = rr_ensemble.apply(params, sx)
      np.testing.assert_allclose(
          y[0][0],
          jnp.mean(params[0][0], axis=0) + 3 * x,
          atol=1e-5,
          rtol=1e-5,
      )
  
imports: import functools
  from typing import Any
  from acme.agents.jax.mbop import ensemble
  from acme.jax import networks
  from flax import linen
  import jax
  import jax.numpy
  import numpy
  from absl.testing import absltest
label_desc: Use image node_id 10 for calling the EnsembleTest obj's underlying member method code with example usage: obj.test_apply_mean_structured() without return types